package 杂Test;

import java.util.Locale;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 石方旭
 * Date: 2022-09-22
 * Time: 17:03
 */
public class Demo1 {
    public static void main(String[] args) {
        String x = "fmn";

        String y = x.replace('f','F');
        y += "wxy";
        System.out.println(y);
    }
}
